Affiliation:
1. CSIR-National Institute of Oceanography, Dona Paula 403004, Goa, India
2. ESSO-National Institute of Ocean Technology, Narayanapuram, Pallikaranai Chennai 600100, Tamil Nadu, India
Abstract
This work involves the application of a non-linear method, multifractal detrended fluctuation analysis (MFDFA), to describe fish sound data recorded from the open waters of two major estuarine systems. Applying MFDFA, the second-order Hurst exponent [Formula: see text] values are found to be [Formula: see text] and [Formula: see text] for the fish families Batrachoididae (common name: Toadfish) and Sciaenidae (common name: Croakers, drums), respectively. The generalized Hurst exponent [Formula: see text]-related width parameters [Formula: see text] are found to be [Formula: see text] and [Formula: see text], respectively, for toadfish and Sciaenidae vocalizations, implying greater heterogeneity and multifractal characteristics. The results suggest that the Sciaenidae fish calls are smoother in comparison with Batrachoididae. Clustering of multifractal spectrum-related parameters with respect to toadfish and Sciaenidae vocalization characteristics is observed in this analyses.
Funder
CSIR National Institute of Oceanography
ESSO - National Institute of Ocean Technology
Publisher
World Scientific Pub Co Pte Lt
Subject
General Physics and Astronomy,General Mathematics
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